Blue Axelrodi Rasboras
Sundadanio axelrodi · Peaceful · Advanced care
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A true micro-fish that glows electric blue-green along its flank. Shy, peaceful and best in a calm, planted nano tank with soft acidic water and a good-sized group.
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Species profile Sundadanio axelrodi
Origin
Peat swamp forests of Borneo and Sumatra, Southeast Asia
Family
Danionidae
Adult size
Up to 2 cm (0.8 in)
Diet
Micro-foods: crushed flake, powdered fry food, baby brine shrimp, cyclops, micro-worms (Micropredator)
Temperament
Peaceful
Swimming level
Middle
Minimum group
10+ (shoaling)
Lifespan
2-3 years
Minimum tank
30 L (8 gal)
Water type
Freshwater
Size to scale
2 cm adult length, shown to scale against an iPhone 15 Pro (14.66 cm).
Natural range
Where it comes from — Southeast Asia
Peat swamp forests of Borneo and Sumatra, Southeast Asia
Water
Singapore tap water vs its needs
Hardness: Very soft (1-6 dGH).
In the aquarium
How it lives in the tank
Swims in the middle of the tank
Keep in a group of 10+
Sensitivity Index — Sensitive
Reacts to swings — add only to a cycled, stable tank and change water little-and-often.
Our own read on how forgiving this species is of water changes — not a formal standard.
Keeping & care
What this fish needs
Feeding
Recommended food
Compatibility
Best tankmates
Community
